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RISK MANAGEMENT - Structural interest rate risk - Results of NIM and EVE Shocks (Details) - Interest rate risk [member]
$ in Millions
 12 Months Ended
Dec. 31, 2024
COP ($)
Banco de Bogota S.A. | Parallel upward shock  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE $ (1,216,132)
Banco de Bogota S.A. | Parallel downward shock  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE 311,377
Banco de Bogota S.A. | Steepening shock (short-term rates down, long-term rates up)  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE 133,630
Banco de Bogota S.A. | Flattening shock (short-term rates up, long-term rates down)  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE (657,975)
Banco de Bogota S.A. | Short-term upward shock  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE (692,773)
Banco de Bogota S.A. | Short-term downward shock  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE 135,650
Banco de Occidente S.A. | Parallel upward shock  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE (322,975)
Banco de Occidente S.A. | Parallel downward shock  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE (85,678)
Banco de Occidente S.A. | Steepening shock (short-term rates down, long-term rates up)  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE 155,760
Banco de Occidente S.A. | Flattening shock (short-term rates up, long-term rates down)  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE (331,065)
Banco de Occidente S.A. | Short-term upward shock  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE (269,128)
Banco de Occidente S.A. | Short-term downward shock  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE 49,635
Banco Popular S.A. | Parallel upward shock  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE (408,513)
Banco Popular S.A. | Parallel downward shock  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE 252,939
Banco Popular S.A. | Steepening shock (short-term rates down, long-term rates up)  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE 128,062
Banco Popular S.A. | Flattening shock (short-term rates up, long-term rates down)  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE (199,153)
Banco Popular S.A. | Short-term upward shock  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE (255,127)
Banco Popular S.A. | Short-term downward shock  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE 167,920
Banco AV Villas | Parallel upward shock  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE (136,325)
Banco AV Villas | Parallel downward shock  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE 23,948
Banco AV Villas | Steepening shock (short-term rates down, long-term rates up)  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE 36,585
Banco AV Villas | Flattening shock (short-term rates up, long-term rates down)  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE (74,329)
Banco AV Villas | Short-term upward shock  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE (95,345)
Banco AV Villas | Short-term downward shock  
Disclosure of risk management strategy related to hedge accounting [line items]  
Increase (decrease) in NIM and EVE $ 22,022